I just installed the hack and I'm pretty sure I did it exactly as outlined, but when I try to submit an article, I get the following error:
Warning: mkdir(/home/twdforum/www/images/articles/4): Permission denied in /home/twdforum/public_html/articles.php on line 366
Warning: copy(/home/twdforum/www/images/articles/4/athletes.jpg): failed to open stream: No such file or directory in /home/twdforum/public_html/articles.php on line 378